巅峰赛 (denpō-sai) is a Japanese term that can be translated as "peak tournament" or "pinnacle competition" in Engpsh. It is often used to refer to a high-level competition or tournament in a particular sport or activity, where the best players or teams participate.

For example, you might say "The Olympic Games are the pinnacle competition in the world of athletics" or "The World Cup is the peak tournament in the world of soccer." You could also use the term "championship" or "title match" to refer to a high-level competition or tournament.